Web Design

In photoshop class, my current project is to create four web pages for a website. In the interest of practicality, I've decided to design my own website that I might actually use if and/or when I ever start selling my amigurumis, which I've been encouraged to do for quite some time now. That got be to thinking, can I legally sell something that I've knit or crocheted if I didn't design the pattern myself? That's what I'm worried about. I mean, I'm visualizing having a section on this website dedicated to the creators of the patterns I use. "Thanks to so and so for this doll pattern, thanks to so and so for this bear pattern..." etc. I don't want to get myself in legal trouble, so I'm doing research to figure out how this will work.